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posted by  adja on 5/11/2007 11:54:49 PM  |  status: Live  

please help

Course Textbook Chapter Problem
Calculus Based Physics Fundamentals of Physics Extended (7th) by Halliday, Resnick, Walker 23 72AP
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72   A nonconducting solid sphere has a uniform volume charge density r. Let be the vector from the center of the sphere to a general point P within the sphere. (a) Show that the electric field at P is given by . (Note that the result is independent of the radius of the sphere.) (b) A spherical cavity is hollowed out of the sphere, as shown in Figure 23-56. Using superposition concepts, show that the electric field at all points within the cavity is uniform and equal to , where is the position vector from the center of the sphere to the center of the cavity. (Note that this result is independent of the radius of the sphere and the radius of the cavity.)
Fig. 23-56 Problem 72.

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posted by ryguy on 5/12/2007 11:19:29 AM  |  status: Live
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posted by ryguy on 5/12/2007 11:19:44 AM  |  status: Live
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